非const左值引用不能使用右值对其赋值:
std::string& r = std::string(); //错误!std::string()产生一个临时对象,为右值假设可以的话,就会遇到一个问题:如何修改右值的值?因为引用是可以后续被赋值的。根据上面的定义,右值连可被获取的内存地址都没有,也就谈不上对其进行赋值。
| package AESUtil | |
| import ( | |
| "bytes" | |
| "crypto/aes" | |
| "crypto/cipher" | |
| "fmt" | |
| ) | |
| func PKCS5Padding(ciphertext []byte, blockSize int) []byte { |
| package RSAUtil | |
| import ( | |
| "crypto" | |
| "crypto/rand" | |
| "crypto/rsa" | |
| "crypto/sha256" | |
| "crypto/x509" | |
| "encoding/pem" | |
| "errors" |
| package main | |
| import ( | |
| "flag" | |
| "fmt" | |
| "log" | |
| "github.com/shogo82148/androidbinary/apk" | |
| ) |
| package main | |
| import ( | |
| "fmt" | |
| "reflect" | |
| ) | |
| var typeRegistry = make(map[string]reflect.Type) | |
| func registerType(typedNil interface{}) { |
| package main | |
| import "fmt" | |
| func main() { | |
| // Directed Acyclic Graph | |
| vertices := map[int][]int{ | |
| 1: []int{4}, | |
| 2: []int{3}, | |
| 3: []int{4, 5}, |
C++版本是-std=c++11
#include <iostream>
class Codinghuang
{
public:
Codinghuang()
{